Bug 2161349 (CVE-2023-0054)

Summary:	CVE-2023-0054 vim: out-of-bounds write in do_string_sub() in eval.c
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	zdohnal
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	An out-of-bounds write flaw was found in Vim, in the do_string_sub function in the eval.c file. The issue occurs because of an invalid memory access due to a missing check of the return value of the vim_regsub function when a specially crafted input is processed. This flaw allows an attacker who can trick a user into opening a specially crafted file to trigger the out-of-bounds write, causing the application to crash.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2161353, 2161374, 2161375
Bug Blocks:	2159622

Description Guilherme de Almeida Suckevicz 2023-01-16 16:53:12 UTC

Out-of-bounds Write in GitHub repository vim/vim prior to 9.0.1145.

Reference:
https://huntr.dev/bounties/b289ee0f-fd16-4147-bd01-c6289c45e49d

Upstream patch:
https://github.com/vim/vim/commit/3ac1d97a1d9353490493d30088256360435f7731

Comment 1 Guilherme de Almeida Suckevicz 2023-01-16 17:11:52 UTC

Created vim tracking bugs for this issue:

Affects: fedora-all [bug 2161353]